90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
/*
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* (C) Copyright 2008
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* Niklaus Giger, niklaus.giger@member.fsf.org
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _VXWORKS_H_
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#define _VXWORKS_H_
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#include <efi_api.h>
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/*
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* Physical address of memory base for VxWorks x86
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* This is LOCAL_MEM_LOCAL_ADRS in the VxWorks kernel configuration.
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*/
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#define VXWORKS_PHYS_MEM_BASE 0x100000
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/* x86 bootline offset relative to LOCAL_MEM_LOCAL_ADRS in VxWorks */
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#define X86_BOOT_LINE_OFFSET 0x1200
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/*
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* VxWorks x86 E820 related stuff
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*
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* VxWorks on x86 gets E820 information from pre-defined offset @
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* 0x4a00 and 0x4000. At 0x4a00 it's an information table defined
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* by VxWorks and the actual E820 table entries starts from 0x4000.
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* As defined by the BIOS E820 spec, the maximum number of E820 table
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* entries is 128 and each entry occupies 20 bytes, so it's 128 * 20
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* = 2560 (0xa00) bytes in total. That's where VxWorks stores some
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* information that is retrieved from the BIOS E820 call and saved
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* later for sanity test during the kernel boot-up.
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*/
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#define E820_DATA_OFFSET 0x4000
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#define E820_INFO_OFFSET 0x4a00
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/* E820 info signatiure "SMAP" - System MAP */
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#define E820_SIGNATURE 0x534d4150
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struct e820_info {
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u32 sign; /* "SMAP" signature */
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u32 x0; /* don't care, used by VxWorks */
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u32 x1; /* don't care, used by VxWorks */
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u32 x2; /* don't care, used by VxWorks */
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u32 addr; /* last e820 table entry addr */
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u32 x3; /* don't care, used by VxWorks */
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u32 entries; /* e820 table entry count */
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u32 error; /* must be zero */
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};
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/*
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* VxWorks bootloader stores its size at a pre-defined offset @ 0x5004.
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* Later when VxWorks kernel boots up and system memory information is
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* retrieved from the E820 table, the bootloader size will be subtracted
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* from the total system memory size to calculate the size of available
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* memory for the OS.
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*/
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#define BOOT_IMAGE_SIZE_OFFSET 0x5004
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/*
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* When booting from EFI BIOS, VxWorks bootloader stores the EFI GOP
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* framebuffer info at a pre-defined offset @ 0x6100. When VxWorks kernel
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* boots up, its EFI console driver tries to find such a block and if
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* the signature matches, the framebuffer information will be used to
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* initialize the driver.
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*
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* However it is not necessary to prepare an EFI environment for VxWorks's
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* EFI console driver to function (eg: EFI loader in U-Boot). If U-Boot has
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* already initialized the graphics card and set it to a VESA mode that is
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* compatible with EFI GOP, we can simply prepare such a block for VxWorks.
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*/
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#define EFI_GOP_INFO_OFFSET 0x6100
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/* EFI GOP info signatiure */
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#define EFI_GOP_INFO_MAGIC 0xfeedface
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struct efi_gop_info {
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u32 magic; /* signature */
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struct efi_gop_mode_info info; /* EFI GOP mode info structure */
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phys_addr_t fb_base; /* framebuffer base address */
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u32 fb_size; /* framebuffer size */
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};
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int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
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void boot_prep_vxworks(bootm_headers_t *images);
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void boot_jump_vxworks(bootm_headers_t *images);
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void do_bootvx_fdt(bootm_headers_t *images);
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#endif
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